Low magnification microscope objective

Claim 1

A low magnification objective comprising a first negative cemented lens component having a concave surface facing the object side and consisting of a biconcave lens element and a biconvex lens element, and a second positive cemented lens component consisting of a negative meniscus lens element and a biconvex lens element, and said objective having the following numerical data: ______________________________________ f = 1 ______________________________________ r.sub.1 = - 0.2703 d.sub.1 = 0.0492 n.sub.1 = 1.51633 ν.sub.1 = 64.1 r.sub.2 = 1.0278 d.sub.2 = 0.0527 n.sub.2 = 1.71285 ν.sub.2 = 43.4 r.sub.3 = - 0.5009 d.sub.3 = 0.2530 r.sub.4 = 0.7140 d.sub.4 = 0.1230 n.sub.3 = 1.78472 ν.sub.3 = 25.7 r.sub.5 = 0.3562 d.sub.5 = 0.0735 n.sub.4 = 1.50378 ν.sub.4 = 66.8 r.sub.6 = 0.7532 ______________________________________ wherein the reference symbol f represent the overall focal length of the objective as a whole, the reference symbols r 1 through r 6 designate radii of curvature on respective lens surfaces, the reference symbols d 1 through d 5 denote thicknesses of respective lens elements and the airspace therebetween, the reference symbols n 1 through n 4 represent refractive indices of respective lens elements and the reference symbols ν 1 through ν 4 designate Abbe's numbers of respective lens elements.